本文關(guān)鍵詞： 多孔射氣介質(zhì) 氡析出率 壓力梯度 溫度　出處：《南華大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：我國(guó)鈾礦開采始于上世紀(jì)60年代，埋藏于淺部的礦產(chǎn)資源大都已被開采，部分礦山已過(guò)渡到深部開采。深部開采將會(huì)使通風(fēng)網(wǎng)絡(luò)內(nèi)各處?kù)o壓的不同，加上采空區(qū)的增多，，很容易造成通風(fēng)系統(tǒng)內(nèi)部的氡滲流析出，改變著各通風(fēng)空間的氡析出量。研究通風(fēng)巷道圍巖中氡的運(yùn)移析出，對(duì)鈾礦井復(fù)雜通風(fēng)網(wǎng)絡(luò)中風(fēng)壓分布的調(diào)整和鈾礦井通風(fēng)降氡排氡的設(shè)計(jì)具有重大的實(shí)際意義和應(yīng)用價(jià)值。 本文在國(guó)家自然基金項(xiàng)目《鈾礦井通風(fēng)網(wǎng)絡(luò)中氡及其子體分布的非線性仿真與控制研究》（項(xiàng)目編號(hào)：1107571）資助下，將巷道圍巖抽象為多孔射氣介質(zhì)，通過(guò)在室內(nèi)建立多孔射氣介質(zhì)氡滲流-擴(kuò)散析出試驗(yàn)裝置，試驗(yàn)研究壓力梯度、介質(zhì)溫度對(duì)介質(zhì)表面氡析出率的影響。主要工作如下： （1）實(shí)驗(yàn)研究了鈾尾礦的鐳含量和介質(zhì)的孔隙率，根據(jù)模型試驗(yàn)的相似準(zhǔn)則原理，自行設(shè)計(jì)、研制了多孔射氣介質(zhì)氡滲流-擴(kuò)散析出的試驗(yàn)裝置，很好地實(shí)現(xiàn)了對(duì)壓力的控制和溫度的測(cè)量。 （2）對(duì)于本試驗(yàn)裝置，在壓力梯度小于827.6Pa/m時(shí)，高壓側(cè)介質(zhì)表面的氡析出率隨壓力梯度的增大呈指數(shù)下降；低壓側(cè)介質(zhì)表面的氡析出率隨壓力梯度的增大呈現(xiàn)線性增長(zhǎng)；隨著壓力梯度的繼續(xù)增大，介質(zhì)兩側(cè)氡析出率趨于穩(wěn)定。相對(duì)而言，介質(zhì)溫度的改變對(duì)氡析出率的影響比較小。
[Abstract]:Uranium mining in China began in -40s. Most of the mineral resources buried in shallow areas have been mined, and some of them have been transferred to deep mining. Deep mining will make the static pressure in the ventilation network different, and the number of goaf will increase. It is easy to cause the exhalation of radon in the ventilation system and change the amount of radon exhalation in each ventilation space. It is of great practical significance and application value to adjust the distribution of wind pressure in the complex ventilation network of uranium mine and to design the design of reducing radon and radon in uranium mine ventilation. In this paper, the roadway surrounding rock is abstracted into porous gas medium, supported by the National Natural Fund project "nonlinear simulation and control of radon and its children in uranium mine ventilation network" (project number: 1107571). The effects of pressure gradient and medium temperature on the radon exhalation rate on the surface of porous radiating medium were studied by establishing an experimental apparatus for radon percolation and diffusion in porous gas medium. The main work is as follows:. The radium content of uranium tailings and the porosity of media are studied experimentally. According to the principle of similarity criterion of the model test, an experimental apparatus for radon percolation and diffusion in porous gas medium has been developed. The control of pressure and the measurement of temperature are well realized. 2) for this apparatus, when the pressure gradient is less than 827.6 Pa / m, the radon exhalation rate of the high pressure side medium surface decreases exponentially with the increase of the pressure gradient, and the radon exhalation rate of the low pressure side medium surface increases linearly with the increase of the pressure gradient. With the increasing of the pressure gradient, the radon exhalation rate on both sides of the medium tends to be stable, and relatively speaking, the change of the medium temperature has little effect on the radon exhalation rate.
【學(xué)位授予單位】：南華大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TD72

【引證文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 王義江;深部熱環(huán)境圍巖及風(fēng)流傳熱傳質(zhì)研究[D];中國(guó)礦業(yè)大學(xué);2010年

相關(guān)碩士學(xué)位論文 前1條

1 洪昌壽;基于通風(fēng)控氡的典型鈾礦山罐籠提升礦石量限值研究[D];南華大學(xué);2014年

本文編號(hào)：1513645